Product Information / NdFeB·SmCo >> Surface Processing
Since Neodymium type rare earth magnets rust easily compared to the Samarium Cobalt type, surface treatment is generally utilized on Neodymium type magnets. Although various methods to treat the surface of Neodymium magnets exist, Shin-Etsu has pioneered the development of, and was the first in the world to succeed in implementing the nickel electroplating method of surface treatment. Currently nickel electroplating is the standard method of treating Neodymium type magnets.
Compared to other surface treatment methods, nickel electroplating has superior corrosion resistance, shock resistance, cleanliness, measurement tolerances and cost. It is the primary method used to treat the surface of Shin-Etsu's N-series magnets. Also, in response to customer demand we offer magnets with electroless nickel plating, spray paint coating, and electric paint surface treatments.
1: Excellent 2: Fair 3: Poor
| Name | Nickel electroplate |
Electroless nickel coating |
Inorganic coating |
Aqueous coating |
Epoxy coating |
|---|---|---|---|---|---|
| Color | silver | silver | Gray | Black | Black |
| PCT | 1 | 1 | 2 | 3 | 2 |
| Humidity Test | 1 | 1 | 2 | 3 | 1 |
| Salt Spray Test | 3 | 3 | 1 | 3 | 1 |
| Heat Cycle | 2 | 2 | 2 | 2 | 2 |
| Heat Resistance | 3 | 3 | 2 | 2 | 3 |
| Collision Test | 2 | 2 | 2 | 3 | 2 |
| Film to material adhesion test | 2 | 2 | 2 | 2 | 2 |
| Glue adhesion test | 2 | 2 | 2 | 3 | 2 |
| Tolerance accuracy | 2 | 1 | 2 | 2 | 2 |
| Cost | 1 | 2 | 2 | 1 | 2 |
Other special treatments
| Name | Color | For use in |
| RX coat | Black | Oil, alternative freon (CFC) |
|---|
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